2010 ME70 Workshop (PC1003, EK60)

Metadata Updated: September 19, 2016

The third leg of the 2010 SEAMAP Reeffish Survey, PC 1003, was originally scheduled as an experimental multibeam sonar workshop. However, on July 12, 2010, FSV Pisces was directed to participate in the response to the Deepwater Horizon (DWH) oil spill by monitoring the area around the well head using Simrad EK60 echo sounders while pressure testing of the cap installed on the well was conducted. This testing period was expected to last for 24 to 48 hours, after which the scheduled workshop would commence. Pisces monitoring effort was later extended and continued through July 20, precluding completion of almost all of the multibeam sonar workshop objectives.

Pisces departed Pascagoula at about 1800 CDT on July 14 and proceeded toward DWH. Clearance to begin operations near DWH was received at 2230 on July 15 and survey operations began at 0000 on July 16 and continued until 0000 on July 20 after which Pisces returned to Pascagoula. Acoustic surveys using Simrad EK60 split beam echo sounders at 18, 38, 120, and 200 kHz and ME70 multibeam echo sounder at 70-120 kHz were conducted along transects spaced 0.1 run apart in the area around DWH. The survey was completed in rectangular areas using north-south and east-west transects at ranges from 1500 m to 2.5 run from DWH. At ranges within 1500 meters of DWH, a free-form survey was conducted to maneuver around other ship traffic and stationary platforms and cover as much of the space around the well head as possible including a large number of passes directly over the well. Data were also collected along transects running from southwest to northeast in an area northwest of DWH where earlier seismic measurements had shown fault lines below the sea floor running in generally that same direction.

During the survey, the echo sounder systems were used to observe a number of sonar targets that are assumed to be locations where methane or other gas bubbles are being released from the seabed. These are known to occur naturally in this area and most of the observations can be attributed to natural seeps. Similar observations were made intermittently directly over the DWH well head and appear to indicate gas that was escaping from the well. Other sonar targets observed are believed to be riser pipes, ROV tethers, and other equipment associated with the DWH response activity as well as sunken wreckage of the DWH platform on the sea floor.

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Dates

Metadata Date September 12, 2016
Metadata Created Date September 19, 2016
Metadata Updated Date September 19, 2016
Reference Date(s) July 15, 2010 (creation)
Frequency Of Update notPlanned

Metadata Source

Harvested from NOAA CSW Harvest Source

Additional Metadata

Resource Type Series
Metadata Date September 12, 2016
Metadata Created Date September 19, 2016
Metadata Updated Date September 19, 2016
Reference Date(s) July 15, 2010 (creation)
Responsible Party DOC/NOAA/NMFS/NEFSC> Northeast Fisheries Science Center (Principal Investigator)
Contact Email
Access Constraints Cite as: Southeast Fisheries Science Center (2010): Water Column Sonar Data Collection (PC1003, EK60). National Centers for Environmental Information, NOAA. doi:10.7289/V5HT2MC5 [access date], Resource may not be available for up to one year after initial collection.
Bbox East Long -88.00415
Bbox North Lat 29.90066
Bbox South Lat 28.06667
Bbox West Long -88.49971
Coupled Resource
Frequency Of Update notPlanned
Guid gov.noaa.ngdc.mgg.wcd:PC1003_EK60
Harvest Object Id 89d99919-c868-4dc7-8ee0-92360a7e44f5
Harvest Source Id 2aed8e29-fc5b-4cde-aa66-fb1118fd705e
Harvest Source Title NOAA CSW Harvest Source
Licence While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty., These data are considered raw and have not been subjected to the NOAA's quality control or quality assurance procedures. They are released for limited public use as preliminary data to be used only with appropriate caution. NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty., Not subject to copyright protection within the United States.
Metadata Language
Metadata Type geospatial
Progress completed
Spatial Data Service Type
Spatial Reference System urn:ogc:def:crs:EPSG:4326
Spatial Harvester True
Temporal Extent Begin 2010-07-15T03:55:29
Temporal Extent End 2010-07-21T06:10:50

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